Weight is not related to age, for example you may get a 60 year old who's slightly short weigh a healthy 48kg, or a 12 year old at an average height who's 48kg. Weight is related to height, which is indirectly related to age (for children/adolescents who are still growing. )
1300grams
yes
It definitely could be. It depends on your height, body build, how fast you've developed etc. If you really want to know you should see a professional.
about 90 lbs
at least like 40 pounds
No, 105 to 106 pounds is a very good weight for a 13 year old 5 foot 1 inch girl. It is not heavy at all.
it dipense on how tall you are
Yes, the normal is about 95-100.
My science teacher and me both agreeed on 1300g
i dont know not that heavy ..im guessing
54 kg I am 13 and weigh about 8 stone